Erin Wasson has sparked concerns for health after posting a topless photo, where she's showing off her extremely thin frame and protruding ribs.

The 32-year-old model posted the skinny snap on Instagram Sunday with the caption "Live a little."

The snapshot has gotten over 5,000 likes, but some fans are worried about her health. "She's a skeleton" one shocked viewer commented, while another urged the actress to "eat a little."

The "Abraham Lincoln: Vampire Hunter" star has said that she's always been thin.

"I remember I was tormented for being flat-chested and really skinny, and I had really short hair because I would go to the barber and get my hair cut with my dad, so people always thought that I looked really butch," she told Sydney's Daily Telegraph.

"I think, more than anything at this point in my career, my responsibility is to stay strong — mind, body and soul ... I’ve always been an athletic person, I’ve been blessed with good genes from my mum and dad and I’m going to ride that genetic wave for as long as I can."

What do you think of her photo? Do you think she's too thin? Tell toofab in the comment section below, and click "Launch Gallery" above to see more stars who've battled weight criticism.

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